<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>3浮动布局</title>
    <style>
        .fu{
            background-color: #ff0;
            /*height: 100px;*/
            /*overflow: hidden;*/
        }
        .fu div{
            width: 100px;
            height: 100px;
            border: 3px solid #f00;
        }
        .z1{
            background-color: #f00;
            float: left;
        }
        .z2{
            background-color: #0f0;
            float: right;
        }
        .z3{
            background-color: #00f;
            /*float: left;*/
        }
        ul{
            margin: 0;
            padding: 0;
            background-color: #0aa1ed;
            overflow: hidden;
            list-style: none;

        }
        ul li{
            height: 40px;
            width: 100px;
            /*border: 5px solid #f00;*/
            float: left;
            /*background-color: red;*/
            color: aliceblue;
            text-align: center;
            line-height: 40px;
        }
    </style>

</head>
<body>
    <div class="fu">
        <div class="z1"></div>
        <div class="z2"></div>
        <div class="z3"></div>
    </div>
    <ul>
        <li>首页</li>
        <li>免费课</li>
        <li>猎才课</li>
        <li>大厂就课</li>
    </ul>
</body>
</html>